The Paris Agreement, a global deal on climate change which is meant to save the world from catastrophic effect of global warming through various country-specific actions, entered into force on Friday(November-4) - making it an important day in the history of mankind.The Agreement, which reached the threshold for entry into force a month ago on October 5, was adopted by 195 countries, including India, in Paris in December last year. India had ratified it on October 2 while two biggest polluters of the world - China and the USA - had done this in early September.Though the countries are supposed to take their respective climate actions under the Paris deal from January 1, 2021, the four years from now till 2020 will be crucial to frame the rules of its implementation. Beginning of the rule making process will start during the forthcoming climate conference (COP22) in Marrakech, Morocco. The 12-day Conference will begin on November 7.